1225623 has 8 divisors (see below), whose sum is σ = 1867648. Its totient is φ = 700344.

The previous prime is 1225621. The next prime is 1225643. The reversal of 1225623 is 3265221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1225623 - 2¹ = 1225621 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 58363 = 1225623 / (1 + 2 + 2 + 5 + 6 + 2 + 3).

It is a Duffinian number.

1225623 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1225623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29161 + ... + 29202.

It is an arithmetic number, because the mean of its divisors is an integer number (233456).

2^1225623 is an apocalyptic number.

1225623 is a deficient number, since it is larger than the sum of its proper divisors (642025).

1225623 is an equidigital number, since it uses as much as digits as its factorization.

1225623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58373.

The product of its digits is 720, while the sum is 21.

The square root of 1225623 is about 1107.0785879964. The cubic root of 1225623 is about 107.0168838178.

The spelling of 1225623 in words is "one million, two hundred twenty-five thousand, six hundred twenty-three".